What Happens When SO2 Reacts With Steel?

Steel can be corroded by sulphur dioxide in the presence of water.
••• Jupiterimages/Photos.com/Getty Images

Sulphur dioxide, SO2, is a colorless gas that is toxic to human beings. It is produced both naturally by volcano's and by combustion of car gasoline. In its pure form, sulphur dioxide does not react strongly with metal alloys such as steel. However, in the presence of defects and water, sulphur dioxide can be highly corrosive.

Reaction Between Sulphur Dioxide and Steel

Steel is a general term for metal alloys containing iron, carbon and manganese with smaller amounts of silicon, phosphorus, sulphur and oxygen. In the absence of water, sulphur dioxide does not react strongly with steel. However, if sulphur dioxide is exposed to the atmosphere it reacts with water vapor and oxygen forming corrosive sulphuric acid. This substance is highly corrosive and can damage steel.

Related Articles

What Is Chlorine Dioxide?
Signs of a Chemical Reaction With Steel Wool and Peroxide
Difference Between 316 & 308 Stainless Steel
How to Tell the Difference Between Cast Iron & Cast...
How to Flame Harden Steel
Physical and Chemical Properties for the Element Aluminum
Why Is Smog Bad?
Differences Between 52100 & E52100 Steel
How to Harden Steel With Motor Oil
Major Sources of Sulfur Dioxide
What is Silicon Dioxide?
The Mechanical Properties of JIS SCM 420H Steel
Steel Vs. Galvanized Steel Strength
Can Aluminum Be Heated & Bent?
Hazards of Copper Sulfate
How to Make Sodium Nitrate
How to Dissolve Steel
Limestone Chemical Components
What Is the Hardest-Known Metal?
Facts About Calcium Chloride

Dont Go!

We Have More Great Sciencing Articles!